Press for the manufacture of tubes from molten metal.



A. SOHNAKENBERG.

PRESS FOR THE MANUFACTURE OF TUBES FROM MOLTEN METAL.

APPLICATION FILED MAY 5, 1913.

1,125,185, Patented Jan.19, 1915.

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AUGUST SCHNAKENBERG, OF VOHWINKEL, NEAR DUSSELDORF, GERMANY.

PRESS FOR THE MANUFACTURE OF TUBES FROM MOLTEN METAL.

Specification of Letters Patent.

Patented Jan. 19, 1915.

Application filed May 5, 1913. Serial No. 765,716.

1 0 all whom it may concern Be 1t known that I, AUGUsr SCHNAKEN- BERG, a subject of the Emperor of Germany,

residing at Vohwinkel, near Dusseldorf,

Empire of Germany, have invented certain new and useful Improvements in and Relating to Presses for the Manufacture of Tubes from Molten Metal, of which the followlng is a specification.

This invention is shown in the accompanying drawing.

It relates to presses for the manufacture of tubes, wires and the like from lead or other metal, wherein the metal is extruded by means of a piston by hydraulic pressure from the press-cylinder forming the mold; and the press-cylinder and the operating cylinder are arranged close behind each other. In presses of this kind, the press and high-pressure water cylinders of which are connected together solely by means of a sleeve screwed on from the exterior, a distance-piece being arranged between them, there is the disadvantage, on the one hand that .the heat radiating from the liquid metal is transmitted to the water-cylinder through the metallic connecting parts by reason of the small distance away of the press-cylinder, which leads to inconvenience in many ways, interruptions in working, etc., and on the other hand the interior of the press is shut ofl all around from the exterior by the sleeve and thus observation prevented in the event of any faults developing; it is also diflicult of access.

This invention has for its object to 0b viate all these disadvantages and consists in that the two cylinders are braced together by means of a distance piece provided with openings (windows) which permits inspection of the interior of the press, provides for air-cooling and centers the two cylinders relatively to each other in the most exact manner.

The drawing shows a press for the manufacture of lead-tubes of small diameter, having one constructional form of my invention applied thereto.

Figure 1 shows the press in side elevation, and Fig. 2 in longitudinal section.

1 is the thick-walled press-cylinder with a nozzle 2 and die-orifice 3. The high-pressure water-cylinder or operating cylinder 1 has a piston 5, on the rod of which is the mandrel 6 that extends through the dieorifice.

7 is the supply-pipe for the high-pressure water, which enters the operating cylinder 4: beneath the piston and is provided with a controlling valve 8 and drain-pipe.

The juxtaposed ends of the cylinders 1 and 1 are provided with flanges 9 and 10. Between these flanges is arranged the distance-piece 11, which centers the cylinders and holds them at a constant distance from each other and has around its periphery apertures or windows 12, 12 arranged at amholes 16 in the flange 10 of the lower cylinder. The screw-bolts are made with capstan-heads -17 to enable them to be operated by means of a key. Instead of the annular flanges the cylinders could obviously be provided with other suitable projections permitting their connection by means of screw-bolts or the like.

Having now particularly described and ascertained the nature of my said invention and in what manner the same is to be performed, I declare that what I claim is 1. In a press for the manufacture of tubes from molten metal, the combination of a hydraulic cylinder with a press cylinder, a piston in said hydraulic cylinder, a piston in said press cylinder rigidly interconnected with said first named piston, a mandrel connected with said second named piston, a distance piece inserted between said cylinders and bolts connecting the juxtaposed ends of the two cylinders.

2. In a press for the manufacture of tubes from molten metal, the combination of a hydraulic cylinder with a press cylinder, a piston in said hydraulic cylinder, a piston in said press cylinder rigidly interconnected Dated this 10th day of March 1913.

With said first named piston, a mandrel con- In testimony whereof I aiiiX my signature nected with said second named piston, a disin presence of tWo Witnesses.

tance piece inserted between said cylinders AUGUST SOHXAKENBERG. [LS-1 having a plurality of apertures,.a'nd bolts Witnesses:

connecting the juxtaposed ends of the two HELEN NUFER,

cylinders. 4 JULIUS F ESTNER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of IPatentS.

Washington, D. G. 

